Scoop scant 1/4 cup of batter into each muffin-pan cup. Bake 12 to 15 minutes or until toothpick inserted into centers comes out clean. Cool slightly in pans on wire rack. Transfer cupcakes from pans to wire rack; cool completely.

For frosting: In large bowl, with mixer on med. speed, beat mascarpone and heavy cream until combined. Gradually beat in confectioners' sugar, scraping down side of bowl occasionally. Increase speed to medium-high; beat in vanilla until medium peaks form. Refrigerate until ready to use.

Fill piping bag with curd; snip tip off of bag. To fill cupcakes, insert tip of piping bag into top of cooled cupcakes. Squeeze about 2 teaspoon curd into center. Repeat with remaining cupcakes.

Spread frosting on cupcakes. In shallow dish, place sanding sugar. Roll edges of each cupcake in sugar. Decorate tops with jelly beans. Decorated cupcakes can be refrigerated up to 2 days (allow to come to room temperature before serving).